Subtract 42/25 from 21/84
1st number: 21/84, 2nd number: 1 17/25
21/84 - 42/25 is -143/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 25 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
21/84 = 21 × 25/84 × 25 = 525/2100 - Likewise, for the 2nd fraction, since 25 × 84 = 2100,
42/25 = 42 × 84/25 × 84 = 3528/2100 - Subtract the two like fractions:
525/2100 - 3528/2100 = 525 - 3528/2100 = -3003/2100 - After reducing the fraction, the answer is -143/100
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